PCBs
importance of cleaning for improved aesthetics and a more positive end-user perception. 4. Improved quality control: No-clean
fl ux residue can pose challenges during inspections, sometimes making quality control (QC) assessments and fi eld repairs more diffi cult. Thoroughly cleaning the remnants of no-clean fl ux can help simplify and enhance the accuracy of PCB inspections.
How to clean no-clean fl ux – choosing the right fl uid The process of cleaning no-clean fl ux residues involves selecting the right cleaning fl uid and method for the specifi c fl ux used. Given the variations in fl ux formulations across manufacturers, it is essential to match the cleaning solution to the fl ux chemistry accurately. Cleaning fl uid suppliers offer a range of fl ux removers tailored to different fl ux chemistries, allowing for effi cient removal of stubborn residues. It is recommended that PCB manufacturers consult with their cleaning fl uid supplier. A good supplier can help choose a fl uid that will not only effectively remove the fl ux residue, but also be compatible with the PCB substrate and other materials on the board. The fl ux remover should be strong enough to effectively remove the fl ux residue,
Benchtop manual cleaning involves a meticulous four-step approach for manually wetting, scrubbing, rinsing, and drying
Importantly, look for fl uids and tools engineered specifi cally for PCB cleaning to ensure effectiveness, regulatory compliance, and worker safety.
In contrast, vapour degreasing is ideal for batch cleaning larger quantities of PCBs. This automated process immerses contaminated PCBs in boiling cleaning fl uid or its fl uid vapors inside a vapour degreasing machine. Vapour degreasing is a fast, consistent, and repeatable process that ensures the PCB batch emerges from the vapour degreaser clean, dry, and residue-free.
Conclusion
yet not cause damage to metal or plastic components or coatings. Some cleaning fl uid suppliers have fi eld engineers that run on-site audits to evaluate cleaning methods. Some have also proactively conducted comprehensive, in-lab cleaning tests with the industry’s most popular solder pastes and fl uxes to ensure cleaning success. Rely on those suppliers to recommend the cleaning fl uids and cleaning methods that will work best.
How to clean no clean fl ux – methods PCB manufacturers are presented with a range of options when it comes to PCB
cleaning, with manual benchtop cleaning and automated vapour degreasing being popular choices. Benchtop manual cleaning involves a meticulous four-step approach for manually wetting, scrubbing, rinsing, and drying the PCB. Manual cleaning effectively addresses damage concerns when working with more delicate or sensitive components. Benchtop cleaning methods may incorporate various tools such as aerosol fl uids with a dispensing tool and brush for scrubbing, presaturated wipes for targeted cleaning, or cleaning pens for spot cleaning in the fi eld or during rework operations.
While the advent of no-clean solder fl ux has revolutionised electronics manufacturing by ending the need for traditional PCB cleaning processes, there are still instances where cleaning becomes necessary for best PCB performance, reliability, and aesthetics. By understanding the nuances of different flux chemistries and employing proper cleaning fluids and methods, PCB manufacturers can ensure the integrity and quality of their electronic assemblies, even in the era of “no-clean” fluxes.
www.microcare.com
Automotive-Qualified Single Pair Ethernet Devices For Seamless Ethernet Architecture
Automotive designers are transitioning to a centralized computer network in which any service and information can be accessed anywhere in the vehicle using low-speed sensors, actuators and other edge devices that are easily connected to the cloud through a standard Ethernet system.
The first automotive-qualified physical layer (PHY and MAC-PHY) devices implement the IEEE 10BASE-T1S Ethernet standard which reduces cost through simple wiring. Alongside these PHYs and MAC-PHYs, the 100BASE-T1 Ethernet switch family supports Time Sensitive Networking for time-stamping features that support time synchronization, among other TSN functionality. All these devices reduce development time and risk through using well-known Ethernet networking for both in- vehicle architecture and industrial designs.
microchip.com/SPE
www.cieonline.co.uk
The Microchip name and logo and the Microchip logo are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. All other trademarks are the property of their registered owners. © 2024 Microchip Technology Inc. All rights reserved. MEC2557A-UK-02-24
Components in Electronics
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